JPS62114852A - Workpiece machining data transmitting system in numerically controlled machine tool - Google Patents

Abstract

PURPOSE:To reduce the burden of a central computer and an NC device, by providing such an arrangement that a memory means having a function of write-in and read-out of data necessary for the machining of a workpiece in an electrically contactless manner, is carried by a pallet on which a workpiece is loaded. CONSTITUTION:A machining data wire-in/read-out head 7 for a workpiece 9 is arranged in each of a workpiece preparing station 3 for supplying workpieces to machining centers 2a, 2b, an automatic exchanger 10 for a pallet 4 loaded with a workpiece 9 or a machining table, and a measuring station 6 for a machined workpiece 9. On the contrary a memory means 8 such as an IC card having a function of write-in and read-out of data necessary for machining the workpiece 9 is set in the pallet 4. Accordingly, the workpiece 9 and data for machining the same are simultaneously transmitted. Thereby it is possible to reduce the burden of a central computer 1 and an NC device and to constitute a compact system having a high degree of operational accuracy.

Description

[Detailed Description of the Invention] The present invention relates to a workpiece machining information transmission system in a numerically controlled machine tool, and more specifically, it relates to a numerical control system that simultaneously moves a workpiece and information necessary for its machining. The present invention relates to a workpiece machining information transmission system for controlled machine tools or flexible manufacturing systems.

When machining a workpiece using a conventional numerically controlled machine tool, the workpiece and the information necessary for machining the workpiece have been transferred along completely different movement paths or transmission paths. In other words, the information necessary for machining the workpiece is processed separately from the workpiece by a central computer or NC device connected to the numerically controlled machine tool, and there is no simultaneous communication between the workpiece and the machining information for the workpiece. It had no mobility at all.

If the above-mentioned processing information transmission method is adopted, the central computer can be used as a workpiece setup station, workpiece loading pallet storage, workpiece measurement station, or the main body of a numerically controlled machine tool. , collects and determines the operating status sent from each device from time to time, and
Information required by the device had to be processed and distributed each time, requiring advanced processing capabilities. For this reason, the load on the central computer and NC device increases, and the information transmission path becomes complicated, which significantly impedes the efficiency of production management.

The main object of the present invention is to find a solution to the above-mentioned problems found in workpiece machining information transmission systems in conventional numerically controlled machine tools.

In view of the above object, the present invention is directed to a numerically controlled machine tool or a production system composed of a plurality of numerically controlled machine tools. Heads for writing and reading information necessary for machining workpieces are installed at the setup station for workpieces supplied to numerically controlled machine tools and the measurement station for machined workpieces, and each workpiece is loaded accordingly. The pallet carries a storage means having a function of writing and reading information necessary for machining the workpiece without electrical contact, and a numerically controlled machine tool is controlled by the stored information in correspondence with the movement of the pallet. The gist of this invention is a system for transmitting workpiece machining information in a numerically controlled machine tool in which information from the numerically controlled machine tool is stored.

By simultaneously transferring the workpiece and the information necessary for machining the workpiece, the load on the central computer and NC device is reduced, and a compact information transmission system with high operational accuracy is constructed.

Figure 1 illustrates the overall structure of the system of the present invention, and shows an FM in which two machining centers are connected to a central computer.
FIG. 2 is a plan view of the S (flexible manufacturing system), and FIGS. 2 and 3 are explanatory diagrams of the method of transmitting workpiece processing information between the information writing and reading head and the storage means.

As seen in these drawings, the central computer (1
) Two machining centers (2a) connected to (
2b), the setup station (3b) for the workpieces to be supplied to these machining centers
) and the automatic exchange device (10) for the pallet + (4) loaded with the workpiece (9) or the machining center table (
11) and the measurement station (6) for the machined workpiece (9) are respectively provided with writing/reading heads (7) (7) for processing information on the workpiece (9). In addition, the above write/read heads (7) (7)
, −・, pallets loaded with workpieces (9) (
4) is equipped with a memory card such as an IC card as a storage means (8) having a function of writing/reading information necessary for processing the workpiece. The storage means may not necessarily take the form of a card, such as a rod. The storage means (8), represented by an IC card, can send and receive power, timing signals, serial signals, and read/write signals using a magnetic coupling coil (8a).
8b) is an IC card that can access the data in
Correspondingly, the write/read head (7) (
7) A coil (7) corresponding to the above coil (8a) is also installed on the - side.
a) is provided. In addition, in Figure 3, (13)
is the line of magnetic force generated between both coils. Hereinafter, the procedure for transmitting workpiece processing information in each write/read head (7) (7) will be explained.

■ Workpiece setup station At the workpiece setup station (3), the machining schedule of the workpiece (9) such as priority and process order, the name of the workpiece, the name of the jig, and one pallet (4) are displayed. Information unique to the workpiece (9), such as the number of workpieces (9) installed per workpiece, processing progress, classification of good or defective products, and pallet number, is read out in the form of a man-machine interface with the operator. /Written. Thereby, it is confirmed whether or not the work instruction to the operator matches the workpiece (9) and its machining information. In addition, when an interrupt work (9b) is input, the work to be processed (9b) is input.
The schedule change command of a) and the command to return to the schedule of the work to be machined (9a) upon completion of machining of the interrupt work (9b) are read/written. On the other hand, the central computer (1) stores the workpiece machining time (
Operation rate), number of pieces processed, workpiece inspection data, etc. are sent.

■In the automatic pallet changing device or the automatic changing device (10) of the machining center Paleso I-(4) or the table (11) of the machining center, the machining center (2a) (2b) side numerical control device ( 12) IC card for sending and processing information (8)
Writing is performed. The machining information sent to the machining center using the reading function of the IC card (8) includes the number of the machine program, the machining details, the type and number of tools required for machining the workpiece (9), and the reference value of the cutting pattern. , tool movement (e.g. back polling), type of machining (prototype or automatic machining), etc.In addition, the information written to the IC card (8) includes information such as the modified machine program after prototyping and the workpiece ( 9), the time required for processing (actual value), the sampling value of the cutting pattern, etc.

(2) Measuring station of work At the measuring station (6) of the work (9), reading of measurement information to the measurement station (6) and writing of measurement information to the IC card (8) are performed. The measurement information to be read includes the measurement program number, measurement contents, measurement reference value, tolerance value, etc.
Further, the measurement information to be written includes measurement data and measurement results (good product or defective product).

As can be understood from the above explanation, the present invention is capable of storing processing information of a workpiece, which has conventionally been centrally processed in a real-time manner by a central computer, using a storage device such as an IC card having a writing and reading function. Since the system is configured so that processing can be performed in batch mode, there is no need to constantly supply the work program from the central computer to the NC device, and the link between the central computer and the NC device can be omitted and the memory of the NC device can be saved. This can be highly effective in reducing capacity and the like.

In this way, the present invention improves reliability by matching the workpiece and workpiece information, and reduces the load on the central computer and NC device, by synchronizing the movement of the workpiece and its processing information, and Simplifying NCC functionality greatly contributes to easier production management and higher reliability in numerically controlled machine tools and FMS (flexible manufacturing systems).

[Brief explanation of drawings]

Figure 1 shows an example of the overall structure of the system of the present invention.
FIG. 2 is a plan view of the S (flexible manufacturing system), and FIGS. 2 and 3 are explanatory diagrams of the method of transmitting workpiece processing information between the information writing and reading head and the storage means. (1) -Central computer, (2)...Numerical control machine tool, (3)--Workpiece setup station, (
4) -pallet; (5) -pallet storage;
(6)-Measuring station, (7), writing/reading head, (8)-storage means, (9)-workpiece,
(10) - Automatic pallet exchange device, (11) - Table (workpiece processing position in numerically controlled machine tool), (12)
・-Numerical control device.

Claims (1)

[Claims] (1) In a production system consisting of a numerically controlled machine tool or multiple numerically controlled machine tools, the numerically controlled machine tool, a setup station for the workpieces supplied to the numerically controlled machine tool, and measurement of the machined workpieces. Each station is equipped with a head for writing and reading information necessary for processing the workpiece, and correspondingly writes the information necessary for processing the workpiece without electrical contact on the pallet loaded with each workpiece. and a storage means having a reading function, corresponding to the movement of the pallet,
A system for transmitting workpiece machining information in a numerically controlled machine tool, characterized in that a numerically controlled machine tool is controlled by stored information, or information from the numerically controlled machine tool is stored.